27156901 has 2 divisors, whose sum is σ = 27156902. Its totient is φ = 27156900.

The previous prime is 27156893. The next prime is 27156919. The reversal of 27156901 is 10965172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26532801 + 624100 = 5151^2 + 790^2 .

It is a cyclic number.

It is not a de Polignac number, because 27156901 - 2³ = 27156893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27156931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13578450 + 13578451.

It is an arithmetic number, because the mean of its divisors is an integer number (13578451).

Almost surely, 2^27156901 is an apocalyptic number.

It is an amenable number.

27156901 is a deficient number, since it is larger than the sum of its proper divisors (1).

27156901 is an equidigital number, since it uses as much as digits as its factorization.

27156901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 27156901 is about 5211.2283580745. The cubic root of 27156901 is about 300.5799927868.

The spelling of 27156901 in words is "twenty-seven million, one hundred fifty-six thousand, nine hundred one".